Peat
Guides
Eristalis cryptarum
Bog-dwelling Drone Fly, Bog Hoverfly
Eristalis cryptarum is a Holarctic hoverfly species specializing in bog and wetland habitats. It is notable for its restricted distribution and significant population declines across Europe, with extirpation from much of its former English range and critical endangerment in Denmark. The species exhibits classic Eristalis morphology with distinctive coloration and is a member of the drone fly group, though it is not a bee mimic to the same degree as some congeners. Its larvae are assumed to be aquatic filter-feeders in saturated peat, though they remain undescribed.